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Structural validity of the Insomnia Severity Index: A systematic review and meta-analysis

Manzar, Md Dilshad, Jahrami, Haitham A., Bahammam, Ahmed S.·2021·Sleep Medicine Reviews

DOI 10.1016/j.smrv.2021.101531

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Abstract

The factor structure of the Insomnia Severity Index (ISI) is discussed, with examples being drawn from about 13 disparate reported models. A systematic appraisal of procedural details of studies investigating the dimensionality of the ISI was performed. The databases CINAHL, Cochrane Library, Embase, Medline, and PsycINFO were searched thoroughly, and all articles in English, published, and/or available online as of 14th March 2019, were included. Meta-analyses of Cronbach's alpha and structural validity measures were performed. Several inadequacies or omissions were found in analyses using the three groups of measures. Fifteen out of 20 studies did not employ either EFA or CFA, 10 studies did not report CFA, while five did not report EFA. The most common omissions related to multivariate normality, final model selection based on consideration of fit indices, parsimony, and failure to consider the theoretical construct in the final model selection. Meta-analysis showed that CFA outcome is more robust compared to EFA, two-factor solution is the vigorous presentation of dimensionality compared to a three-factor solution, and ISI has a high pooled Cronbach's alpha. Further validation of the disparate models of the ISI is needed with more comprehensive reporting guidelines, such as the one suggested in the present review.

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Peer Review #1 of "Physical activity questionnaire for older children (PAQ-C): Arabic translation, cross-cultural adaptation, and psychometric validation in school-aged children in Saudi Arabia (v0.1)"
(2022) · PeerJ · doi:10.7287/peerj.13237v0.1/reviews/1
Peer Review #1 of "Physical activity questionnaire for older children (PAQ-C): Arabic translation, cross-cultural adaptation, and psychometric validation in school-aged children in Saudi Arabia (v0.2)"
(2022) · PeerJ · doi:10.7287/peerj.13237v0.2/reviews/1
Peer Review #2 of "Physical activity questionnaire for older children (PAQ-C): Arabic translation, cross-cultural adaptation, and psychometric validation in school-aged children in Saudi Arabia (v0.1)"
(2022) · PeerJ · doi:10.7287/peerj.13237v0.1/reviews/2
Peer Review #2 of "Physical activity questionnaire for older children (PAQ-C): Arabic translation, cross-cultural adaptation, and psychometric validation in school-aged children in Saudi Arabia (v0.2)"
(2022) · PeerJ · doi:10.7287/peerj.13237v0.2/reviews/2
A randomized controlled trial to compare the effects of time-restricted eating vs. Mediterranean diet on symptoms and quality of life in bipolar disorderPreprint
Johnson, S. L., Murray, G., Kriegsfeld, L. J., Manoogian, E. N. C., Mason, L., Allen, J. D., Berk, M., Panda, S., Rajgopal, N. A., Gibson, J. C., et al. (2024) · Research Square · doi:10.21203/rs.3.rs-3789024/v1

Authors: Manzar, M. D., Jahrami, H. A., & Bahammam, A. S.
Affiliations: Majmaah University (SA)
Ministry of Health (BH)
King Saud University (SA)
Corresponding author: Manzar, Md Dilshad
ORCID: Manzar, Md Dilshad
Jahrami, Haitham A.
Bahammam, Ahmed S.
Venue: Sleep Medicine Reviews
Publisher: Elsevier BV
Published: 2021-12
Volume: 60
Pages: 101531
ISSN: 1087-0792 (ISSN-L)
DOI: 10.1016/j.smrv.2021.101531
OpenAlex: W3191158440
Cited by: 138
References: 79
Citations by year: 2026: 28 · 2025: 38 · 2024: 27 · 2023: 23 · 2022: 22
FWCI: 2.95
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
www.elsevier.com/legal/tdmrep-license (tdm)
doi.org/10.15223/policy-017 (stm-asf)
doi.org/10.15223/policy-037 (stm-asf)
doi.org/10.15223/policy-012 (stm-asf)
doi.org/10.15223/policy-029 (stm-asf)
doi.org/10.15223/policy-004 (stm-asf)
Locations: Sleep Medicine Reviews (publishedVersion)
PubMed (publishedVersion)
Funders: Majmaah University (R-2021-40)
Topics: Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Social Sciences › Decision Sciences › Management Science and Operations Research › Psychometric Methodologies and Testing
Social Sciences › Psychology › Experimental and Cognitive Psychology › Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
Keywords: Insomnia Severity Index, factor structure, dimensionality, structural validity, confirmatory factor analysis, exploratory factor analysis, Cronbach's alpha, psychometric validation, reporting guidelines
MeSH terms: Humans, Sleep Initiation and Maintenance Disorders, Psychometrics, Reproducibility of Results

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Structural validity of the Insomnia Severity Index: A systematic review and meta-analysis

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